. . . . monolever small lever . . .
Short levers have less leverage.
If you're wanting to do one finger braking it's still better to move your lever in further on your bars, use a long grip, then grab the end of a longer lever, like Tech 77's.
The most important factors in bmx braking (in order of importance):
1. THE CABLE. Extremely-well lubed, non-kinked inner cable and non-kinked housing (Linear etc. are great, but even old Odyssey Slic's work very well). FILL the housing with Tri-Flow or other lube.
2. Brake lever that doesn't flex, and a long lever is better. Tech 77 = classic.
3. Pads. With certain painted rims, you do need a stickier/gummier pad. Chrome rims do work better, but with the right pads, painted rims work well too.
The brakes themselves are less important. True, some flex less than others, but even a cheap Dia-Tech Hombre can work amazing, if the things above are dialed in.
Also less important is cleaning rims and pads. When people start talking about Simple Green, Windex, Coke etc., these are just band-aid issues. Yes, clean surfaces do brake better. But, if you're needing to do this, you probably have a non-lubed kinked cable and crappy lever.